It's great to hear that your crush has shown interest in you! However, it can be a tricky situation when there is someone else in the picture. Here are a few suggestions on how to navigate this situation and possibly win her over:

1. Communicate openly: Talk to your crush about your feelings and intentions. Be honest about how much she means to you and express your desire to be with her. It's essential to have open and transparent communication in any relationship.

2. Respect her choices: While you're expressing your feelings, it's important to remember that she may still be dating the other guy. Respect her choices and allow her the space to make her own decisions. Ultimately, it's her choice to be with whoever she feels most compatible and happy with.

3. Focus on building a strong connection: Instead of being solely focused on winning her over, work on building a strong emotional connection with her. Spend quality time together, engage in meaningful conversations, and show her your genuine interest and care.

4. Be patient: Winning someone's heart takes time. Relationships are not a race, and rushing things may create unnecessary pressure. Allow your connection to grow naturally and give her the time and space she needs to make a decision about her current dating situation.

5. Show your best self: Be the best version of yourself by focusing on personal growth and self-improvement. This will not only make you more appealing but also ensure that you are ready for a healthy, long-term relationship should things progress with your crush.

6. Be supportive: Regardless of the outcome, be supportive of her decisions. If she chooses to be with the other guy, respect her choice and continue to be a good friend. Remember, a true connection is built on genuine care and understanding, regardless of the romantic aspect.

Remember, it's important to be aware that you cannot control someone else's feelings or decisions. Winning someone over is never guaranteed, but by being genuine, respectful, and patient, you increase your chances of building a meaningful connection with your crush.